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IPMSM can be operated with its full potential using MTPA and field weakening. Generally, it is not determined which motor is connected to inverter. Therefore, among various methods for MTPA and field weakening, LUT(Look-Up Table) generation test in consideration of inductance change by its saturation is not feasible. In this paper, real-time calculation of current reference is addressed in the full...
This paper deals with the identification method of rotor time constant in the 3-phase induction machines at standstill. The effect of inverter nonlinearity by dead time is alleviated by the proposed algorithm. The study proposes modified voltage model as reference model and uses current model as adaptive model. The algorithm is verified in the simulation and the experiment.
This paper presents an improved method of determining voltage reference to detect currents in the three-phase inverter with three shunt resistors. In order to determine the voltage reference, the proposed method uses geometrical property in the voltage boundary hexagon of space vector PWM. The change of voltage reference is represented using time, which explains why the proposed method is called a...
Neuronal damage after seizure is correlated with blood–brain barrier (BBB) leakage. Adiponectin (Ad) has shown protective effects on endothelial function. In this study, we investigated the effects of Ad on cell survival and BBB integrity in the mouse hippocampus after kainic acid (KA) treatment. Twenty-four hours after intracerebroventricular injection of recombinant Ad, mice were treated with KA,...
This paper presents a new gate drive method for high power IGBT to reduce the turn-off spike voltage which is appeared between collector and emitter. In the power circuit of inverter, there is a commutation loop stray inductance between the dc-link capacitors and IGBTs. It affects the turn-off spike voltage of IGBT. In general, snubber circuits are used to control the spike voltage but they are consists...
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